I have a 2007 Buick Rainier 4.2L, 4x2, no wrecks, original owner. The front marker lights blink and side marker lights blink with the left or right turn signal activation. The front side light that should come on with the turn signal at night does not come on either side. I have replaced the hazard turn signal flasher part #15231201 and there was no change. Does anyone have any ideas why the front marker lights flash and don't come on with the headlights? Why the front turn lights no longer work with the turn signals at night? Here is a link to a videoThank you for your help.